Please use this identifier to cite or link to this item:
Title: Effect of light environment on growth of young plants of mahogany (Swietenia macrophylla King)
Other Titles: Efeito do ambiente de luz no crescimento de plantas jovens de mogno (Swietenia macrophylla King)
Authors: Gonçalves, José Francisco de Carvalho
Silva, Carlos Eduardo Moura da
Justino, Gilberto Costa
Nina, Adamir da Rocha
Keywords: Biomass Accumulation
Chlorophyll Contents
Chlorophyll Pigments
Electron Transport Rate
Field Treatments
Forest Succession
Gas Exchange
Leaf Area Ratios
Leaf Gas Exchange
Light Environment
Photosynthetic Traits
Photosynthetically Active Radiation
Root System
Slow Growth
Specific Leaf Area
Stem Diameter
Tree Species
Plants (botany)
Quantum Yield
Issue Date: 2012
metadata.dc.publisher.journal: Scientia Forestalis/Forest Sciences
metadata.dc.relation.ispartof: Volume 40, Número 95, Pags. 337-344
Abstract: In the forest succession intermediate and climax tree species usually exhibit slow growth. The aim of this study was to investigate the biomass accumulation and photosynthetic traits in young S. macrophylla plants subjected to two light environments (1-open field and 2- natural shade). We investigated growth, biomass gain, chlorophyll contents and leaf gas exchange. In open field treatment, the increase photosynthetic performance reflected on the biomass accumulation of the plants, mainly due to the higher growth of the root system and stem diameter. This result happened due to the best use of photosynthetically active radiation, verified by increases in electron transport rate and quantum yield in plants grown in sunlight. This effect favors the carboxylation that was additionally induced by increased leaf gas exchange. On the other hand, the acclimation in the shade exposed seedlings was demonstrated by an increase in leaf area ratio and specific leaf area. We conclude that S. macrophylla seedlings showed physiological plasticity under high or low irradiance. But, above all, when exposed to high irradiance carbon, gain is optimized.
Appears in Collections:Artigos

Files in This Item:
File Description SizeFormat 
artigo-inpa.pdf657,46 kBAdobe PDFThumbnail

This item is licensed under a Creative Commons License Creative Commons